Premium
Extraction and Cleanup of 14C‐Chlorinated Insecticides from Cotton Grown in Treated Soils
Author(s) -
Nash R. G.,
Beall M. L.
Publication year - 1970
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1970.00021962006200030017x
Subject(s) - heptachlor , chemistry , dieldrin , endrin , acetone , hexane , chloroform , residue (chemistry) , methanol , extraction (chemistry) , chromatography , soil water , aldrin , environmental chemistry , pesticide , agronomy , organic chemistry , environmental science , soil science , biology
Dry cotton hay or seed samples from plants grown in 0.5 ppm 14 MC‐DDT, ‐dieldrin, ‐endrin, and ‐heptachlor treated soils were subjected to exhaustive Soxhlet extraction with chloroform/methanol (CM), hexane/acetone (HA), hexane/acetone/methanol (HAM), or hexane/acetone/ methanol/water (HAMW). Extracts further were fractionated by selective elution from Florisil columns and the 14 C‐insecticide residues determined. The relative extracting power of the solvents was HAMW>HAM=CM>HA; this applied to all insecticides except DDT, whose residue was too low for reliable comparison. No solution removed all the 14 C‐residue from plant tissue. HAM afforded greater simplicity and less time in cleanup compared to CM. One dieldrin degradation product, three endrin degradation products, and three heptachlor degradation products, which includes heptachlor epoxide, were believed extracted from cotton hay with HAMW.